https://www.washingtonpost.com/politics/2020/12/18/this-migh...
https://www.nytimes.com/2021/01/04/us/politics/trump-georgia...
https://www.nytimes.com/2021/01/04/us/politics/georgia-voter...
https://www.nytimes.com/2020/11/18/technology/dead-voters-fa...
https://www.washingtonpost.com/politics/2020/12/14/there-is-...
https://www.usnews.com/news/best-states/nevada/articles/2020...
https://www.washingtonpost.com/politics/2020/11/17/two-weeks...
Now, if you buy the conspiracy theory that the above news agencies are all on the take and not a single one of them has a whistleblower that would blow the case wide open for a few bucks, then you can argue all these prove nothing. On the other hand, it's really easy to argue that people that publicly support Trump and criticize his opponents have motivation to put out readily debunked documents hoping that enough people will accept them without doing due diligence to determine if they are legitimate.
https://www.politico.com/news/2020/11/24/controversial-gun-a...
If your sources for "proof" are from anyone that is pro-Trump and repeatedly tears into Trumps opposition, you might want to start with the assumption that motivated reasoning is in play. You can be well-educated, and still have a bias and be inclined to argue for your side to win.
yes, this is the human condition and applies equally to both sides of this debate.